摘要
Super absorbent resin(SAR)is prepared by aqueous high temperature polymerization using hydroxypropyl methylcellulose(HPMC)as monomer backbone material,acrylic acid(AA)and acrylamide(AM)as the graft copolymer monomer,potassium persulfate(KPS)as the initiator to generate free radicals,and N,N`-methylenebisacrylamide(MBA)as cross-linking agent for cross-linking reaction.Simutaneously,the influence of individual factors on the water absorption is investigated,and these factors are mainly AA,AM,KPS,MBA,HPMC,and reaction temperature.The optimized conditions are obtained by the experiment repeating for several times.The water absorption multiplicity and salt absorption multiplicity under the conditions are 782.4 and 132.5 g/g,respectivity.Furthermore,the effects of different temperatures and salt concentrations on its water absorption,as well as the swelling kinetics of SAR are studied.It is indicated the water-absorbing swelling process is mainly caused by the difference in water osmotic pressure and Na+concentration inside and outside the cross-linked molecular structure of the resin,which is not only consistent with the quasi-secondary kinetic model,but also with the Fick diffusion model.
作者
马砺
WANG Xin
LIU Xixi
WEI Gaoming
GUO Ying
MA Li;WANG Xin;LIU Xixi;WEI Gaoming;GUO Ying(School of Safety Science and Engineering,Xi’an University of Science and Technology,Xi'an 710054,China;Key Laboratory of Coal Fire Disaster Prevention,Xi’an University of Science and Technology,Xi'an 710054,China;School of Energy Engineering,Xi’an Uni-versity of Science and Technology,Xi'an 710054,China;Yanzhou Coal Mining Co.,Ltd.,Zoucheng 237500,China)
基金
Funded by National Natural Science Foundation of China(No.52174206)
Shaanxi Provincial Department of Education Youth Innovation Team Construction Scientific Research Plan Project(No.21JP074)
Shaanxi Provincial Department of Education Youth Innovation Team Scientific Research Plan Project(No.22JP047)。
